Pile-driving-follower attachment.



M. T. MGKENNA. PlLB DRIVING foLLoWER ATTACHMENT.

APPLICATION FILED MAY 4, 1911. Y

Patented Feb. 13, 1912.

iinTTnD sTaTns PATENT onirica.

MATTHEW T. MCKENNA, OF' SAN FRANCISCO, CALIFORNIA.

PILE-DRIVING-FOLLOWER ATTACHMENT.

Specification of Letters latent.

Patented Feb. 13, 1912.

Application led May 4, 1911. Serial No. 624,978.

To all whom t may concern Be it known that I, MATTHEW, T. Mc- KENNA, a citizen of the United States, residing in the city and county of San Francisco and State of California, have invented new and useful lImprovements in Pile-Driving-Follower Attachments, of which the fl-,/ lowing is a specification. A

My invention relates to a mechanism whereby piles may be driven in deep water,

and where the heads of said piles are to be submerged beneath the surface, and also-to drivevery short piles.

, The invention consists in'means for guiding the pile, and connecting the driving follewer therewith so that the pile may be driven to any desired depth, and the mechanism subsequently detached.

'The invention consists of the parts and the 4construction and combination of parts, as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which* Figure l is a vertical section showing the connection with the pile and follower.A Fig. 2 is an enlarged section showing the pulleys and ropes for manipulating the connections between the sleeve and pi e. Fig. 3 is a transverse section taken ,through m--x of ig. 2. y A represents the pile to be driven, and 2 is a follower which constitutes a part thereof, and which may be a pile or power transmitting member, and is designed tol rest upon the head of the pile to be driven.

The cylinder 3 is bolted"to the lower end of the follower and thereby constitutes a part of the latter, said cylinder extending downwardly and forming a casing with-in which the upper end of the pile, A, fits loosely. 1 r

4 is ashoe fitted on to the lower end of the follower 2 and secured in the cylinder and resting upon the head of the pile. and thisshoe receives the shock of a driving hammer, and insures the whole length of the pile and follower being moved in unison, preventingialso the tearing out of the bolts which secure the cylinder 3 to the follower. Surrounding this inner cylinder il is a sleeve 5 of larger diameter leaving an annular spacelictweerithetwo; this space being mainrained by longitudinal, lapping ribs (3 and (5 which are secured to the inner and outer sleeve respectively. The-lower cnd of the about, the load of .movement of the pile.

inner sleeve is conical flange, as shown at 3a, the outer periphery of the upturned. portion inclosing the lower end of the exterioreylinder 5, preventing mud from being forced up into the. space between the two and having a working fit thereon.

7 are pawls having their, lower ends fulcrumed to the' interior of the outer sleeve as shown at 8. The pawls sustain the pile in the cylinder while being placed or moved the pile jamming the pawls firmly in the wood. The inner ends of the pawls pass through -slots 9 made in. the inner casing and engage lthe pile, so that when the driving takes place, the outer casing will ,be moved down in unison with the these pawls with the pile A I have shown pulleys 10 journaled between the cylinder 3 and sleeve 5, and Wire or other ropes l1 pass` around these pulleys having their ends secured to the inner casing member 3. These ropes extend upwardly so that by a pull upon these ropes ll the outer casing 5 will be `lifted and the pawls forced into the wood of the pile.

vThe known means, and when sunk to the desired depth, which may be thirty or forty feet, or more under water. the apparatus is'disengaged by means of ropes 12, which pass around another set of the pulleys'13. In this case the ropes have their ends attached to the outer cylinder 5, as shown at 14, and by the pull upon these ropes 12, the movenientl of the two casing sections is reversed; that is, the outer casing will be forced downward, carrying with it the pawls and withdrawing them from the slots 9, and from their engagement with the pile, `leaving the points resting against the inner casing, after which the sleeves and follower may be drawn up and the pile left in position.

lla-ving thus described my invention, Wha-t I claim and desire to secure by Letters Patent, is`

l. A pile dri ving apparatus, comprising a capping cylinder having'a transverse plate adapted to rest`-upon a pile, and a section telescoping over said cyl-india' having pile engaging spurs. 2. An apparatus for driving piles in deep water comprising a follower adapted to rest upon a pile, means upon the follower for provided with an upturned,4

In order to engage pile is driven by any usual well sustaining lie pile, and means adjustable in opposite directions upon ille follower for :supporting the sustaining means and @aus ing the latter to engage with and disengsige from the pile.

3. ln a pile driving apparatus, the coinbiimion with :i cylinder, adjustable over the top of the pile, oi e sleeve concentric with the Cylinder and movable relatively thereto, and provided with pile engaging devices adepte@ to sustain the pile in the cylinder.

Il. A pile placing apparatus., including a. cylinder adapted to embrace e pile, a sleeve movable over the cylinder, and dogs mont mime@ ed on ille sleeve eiiecting to sustain the pile in the cylinder.

5. A pile placing apparatus, including; e cylinder adapted co embrace e pile, e Sleeve movable over the cylinder, clogs mounted on Athe sleeve eeeting to sustain the pile in the cylinder, and means for dsengaging the dogs from the pile. lx1 testimony whereof l lia-ve hereunto seil my hand in the presence of two subscrilou ing witnesses.

MATTHEW il". MGKENNA. Witnesses CHARLES EDELMAN,

C. C, Cools, 

